Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/70965
標題: In-plane and perpendicular exchange bias in Pt/Co /NiO multilayers
作者: Lin, K.W.
Guo, J.Y.
Kahwaji, S.
Chang, S.C.
Ouyang, H.
van Lierop, J.
Phuoc, N.N.
Suzuki, T.
關鍵字: magnetic-anisotropy
期刊/報告no:: Physica Status Solidi a-Applications and Materials Science, Volume 204, Issue 12, Page(s) 3970-3974.
摘要: Exchange bias in [Pt/Co]/NiO multilayers were studied as a function of film thickness and [Pt/Co] layer repetition. A strong temperature dependence of the coercivity, H-c,and exchange bias field, H-ex, was observed for the thick and thinnest [Pt/Co]/NiO multilayers. While the thinnest [Pt(3 nm)/Co(1.25 nm)](4)/NiO multilayers exhibits no in-plane exchange bias field, a perpendicular H-ex perpendicular to similar to -150 Oe at 80 K was measured. By contrast, the thickest [Pt(12 nm)/CO(10 nm)](1)/NiO multilayers exhibited an in-plane H-ex/(sic) -600 Oe (with H-ex/(sic) -1300 Oe at 5 K) with no measurable perpendicular exchange bias field. The estimated interfacial exchange coupling energy implies the effective Co layer thickness contributing to the exchange bias is effective only in Co layer in contact with NiO bottom layer. AC susceptibility and the temperature dependence of H-ex show that the a 1.25 nm thick Co component enables perpendicular exchange bias with a reduced blocking temperature T-B similar to 200 K, compared to that (T-B similar to 250 K) for the thick [Pt/Co]/NiO multilayers. This is attributed to disordered CoPt phases that formed due to intermixing between Co and Pt during deposition.
URI: http://hdl.handle.net/11455/70965
ISSN: 0031-8965
文章連結: http://dx.doi.org/10.1002/pssa.200777299
Appears in Collections:期刊論文

文件中的檔案:

取得全文請前往華藝線上圖書館



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.